Planetoid Marble - Signed. There are miniscule bubbles here and there within the glass. These are typical, and they are from the original glassblowing studio process. Resembling a tiny planet, this perfect glass sphere includes "continents" in brilliant colors, and accented with gold leaf, deep within the sculpture, as well as a black/white/yellow "swirl" floating closer to the surface of the sphere, as you see in the closeup pictures.